@baseFont: 15px;
body {
  font-size: @baseFont;
}

@border: 5px + 5;
div {
  width: 200px - 50;
  height: (200px + 50px) * 2;
  border: @border solid red;
  background-color: #666 - #444;
}

img {
  width: 82rem / @baseFont;
  height: 82rem / @baseFont;
}


